ML19308D528
| ML19308D528 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 04/28/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D524 | List: |
| References | |
| NUDOCS 8002280966 | |
| Download: ML19308D528 (2) | |
Text
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EVENT OESCniPTION I
HE l Normal Mode I operation, inoperable position indicator for Rod 5. Group 8 ( ASPR's) con-7 09 60 !
l l HE I trary to Technical Specification 3.1.3.3.
No redundant systems available.
First occur-7 89 80 C4 l rence of this type.
Complied with Technical Specification Action Statement 3.1.3.3.A.2.B. l l 7 89 60 !
hl System restored operable on 8 April 1977.
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l A l3 l 8l0 l lN l 7 89 10 11 12 17 43 44 47 48 CAUSE CESCRIPTION j8 5.
@l Inoperable absolute position indicator caused by amphenol connector faulty oin connection. I 7 89 00 3l l Connector was repaired and operability restored.
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OFFSITE CONSEQUENCES 1
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TYPE DECCTtiPTON
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O!TIONAL FACTORS See attached Supplementarv Information
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SUPPLEMENTARY INFORMATION 1
1.
Report No.:
50-302/77-33 2.
Facility:
Crystal River Unit #3 3.
Report Date: 28 April 1977 4.
Occurrence:
6 April 1977 5.
Identification of occurrence:
In the process of moving Group 8, Axial Power Shaping Rods (APSR's),
the absolute position indicaor for Rod 5 failed causing a condition contrary to Technical Specification 3.1.3.3.
6.
Conditions Prior to Occurrence:
Normal Mode I operation.
7.
Description of Occurrence:
2 At 0812, while adjusting a power imbalance wit! Group 8 Rods, absolute pcsition indicator for Rod 5 failed. Rod posi*. ion was verified by the Rod Zone Limit Switch. Commenced logging position agreement between r
reference indicator and the operable position indication as per SP-300.
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Position indicator for Rod 5 was restored operable during shutdown on 8 April 1977.
8.
Designation of Apparent Cause of Occurrence:
The amphenol connector to the position indicator was found to have a faulty pin connection.
9.
Analysis of Occurrence:
There were no safety implications as the Reactor could have been safely shut down at any time.
10.
Corrective Action:
The amphenol connector was repaired and absolute position indicator for Rod 5 of Group 8 was restored operable.
11.
Failure Data:
This occurrence wat non-repetitive for the APSR group.
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